Continuous control of the nonlinearity phase for harmonic generations.

  title={Continuous control of the nonlinearity phase for harmonic generations.},
  author={Guixin Li and Shumei Chen and Nitipat Pholchai and Bernhard Reineke and Polis Wing Han Wong and Edwin Yue Bun Pun and Kok Wai Cheah and Thomas Zentgraf and Shuang Zhang},
  journal={Nature materials},
  volume={14 6},
The capability of locally engineering the nonlinear optical properties of media is crucial in nonlinear optics. Although poling is the most widely employed technique for achieving locally controlled nonlinearity, it leads only to a binary nonlinear state, which is equivalent to a discrete phase change of π in the nonlinear polarizability. Here, inspired by the concept of spin-rotation coupling, we experimentally demonstrate nonlinear metasurfaces with homogeneous linear optical properties but… CONTINUE READING
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